NEW YORK CITY (WABC) -- It was a crowded and contentious debate stage Wednesday night, as the Democratic candidates running to become the next mayor of New York City squared off.

While the candidates disagreed on topics like immigration and affordable housing, they were in unison on attacking frontrunner Andrew Cuomo.

"One of my regrets is having trusted leaders like Andrew Cuomo," said State Assemblyman Zohran Mamdani.

Alexandria Ocasio-Cortez will endorse Mamdani on Thursday, a widely expected backing coming the morning after the debate.

The endorsement will be announced later Thursday in a statement, the campaign first shared it with the NY Times.

"Assemblymember Mamdani has demonstrated a real ability on the ground to put together a coalition of working-class New Yorkers that is

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